Method of purifying water.



W. H. GREEN. METHOD 0F PURIFYING WATER..

APPLIGATION FILED PEB.17, 1908. .y 898,876 Patented sept. 15,190sv 2SHEETS-SHEET 1.

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W.v H. GREEN.

METHOD 0F PURIFYING WATER.

APPLICATION FILED FEB. 17, 1908.

Patented Sept. 15,1908.

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WALTER H. GREEN,

OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR TC KENNICOTT WATER SOFTENERCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

METHOD 0E PURIFYING WATER.

Original application filed October 18, 1907, Serial No. 397,960.

Serial N o.

To all whom t may concern:

Be it known that I, WALTER H. GREEN, a citizen of the United States,residing at Chicago Heights, in the county of Cook and State ofIllinois, have invented a new and useful Improvement in Methods ofPurifying Water, of which the following is aspecification.

My invention relates to an improvement in the art of purifying, orsoftening, water for industrial purposes; and the primary object of myimproved method is to enable the 'apparatus for practicing it to be sosimpliiied in construction as to avoid all necessity .for frequentlyclimbing it for manipulating niechanism in elevated position, foradjustment and other purposes.

The present application is a division of my pending` application, SerialN o. 397,960, filed October 18, 1907.

In the accompanying drawings, Figure 1 is a view in vertical sectionalelevation of a water-softening apparatus suitable for the practice of myinvention g Fig. 2, a view in side elevation of the valved hard or rawwater box; Fig. 3, a section taken at the line 3 on Fig. 2, and viewedin the direction ofthe arrow; Fig. 4, an enlarged broken and partlysectional view of one form of the means I have devised for automaticallyproportioning the feed of the chemical solution to that of the waterunder treatment, and showing the device in its position relative to anoverflowreceptacle Fig. 5, a broken view of the same in end elevation,showing one position by dotted representation Fig. 6, a section taken onthe line 6 on Fig. 4, and viewed 'in the direction of the arrow Fig. 7,a broken view in elevation showing a modified construction of the deviceillustrated in Fig. 4, and Fig. 8, a similar view of the same regardedin the direction of the arrow in Fig. 7.

The precipitating-tank 9 is equipped with an overflow 10 near its upperend and a valved pipe 11 on its bottom for drawing off sludge andcontaining a downtakeronduit 12, and the water-box 13 surmounting theprecipitating-tank contains a float 14 suspended by a rod 15 from oneend of a lever 16 fulcrumed at its opposite on a standard 17. In a sideof the box 13 near its bottom is provided a discharge-opening 1S throughwhich to direct the raw water into the top of the conduit 12, and thisopening is shown to be Specification of Letters Patent.

Patented Sept. 15, 1908.

Divided and this application filed February 17, 1908. 416,264.

equipped with a slid e-valve 19 for regulating' the area of thedischarge-opening.

The raw water to be treated is supplied from any suitable source andintroduced, as through the medium of a pump represented at 20,discharging through a pipe 21 into the box '13 at its open top. Thechemical solution is contained in a tank 22 shown to be supported at thebase of the settling-tank 9. The solution is fed to the tank 9 through apipe 23 in which a pump 24 is shown to be interposed; and another pipe25 surmounted by a receptacle 26 leads from the latter to the tank 22 toreturn into it and thus save the overflow of the solution. Asrepresentedl in Figs. 1, 4 and 5, the pipe 23 above the top of thesettling-tank is bent to a right-angle to form a horizontal tubular arm27 containing a lateral elongated slot 2S about which lits alongitudinally slidable sleeve 29 for regulating the discharge-area ofthe slot. On the outer end of the arm 27 is rotatably fastened throughthe medium of a stufiing-box 30, or packedjoint, an extension 31 bent toproject at an angle, and preferably a right-angle, to the arm andconnected from its free end by a link 32 with the lever 16. Theadjustable extension 31, which automatically maintains the headof thesolution in correspondence with that of the water in the box 13, isdirectly above the receptacle 26.

In the operation of the apparatus the raw water to be treated enters thebox 13 through the pipe 21 and discharges through the opening 18 in thelatter into the downtake-conduit 12 while the chemical solution entersthat conduit from the pipe 23 through the discharge-slot 23 to mix withthe water for its reaction thereon. Any increase or decrease in the rateof iiow through the pipe 21, under variation in the operation of thepump 20, will raise or lower the level of water in the box 13, therebyvarying the head thereof and raising or lowering the iioat 14correspondingly. As the float rises or falls it moves the lever 16accordingly causing the latter through the link 32 to raise or lower theouter end of the extension 31 to correspond with the change ofwater-level in the box 13 and thus vary the head of the solution in theextension in accordance with the variation" of head in the water-box, sothat as the rate of flowthrough the slot 18 changes under variation ofhead in the wa ter-box, that of the solution through the slot 28 willvary correspondingly as the outer end of the extension 31 is raised orlowered under the action of the float. The surplus of the solutionoverflows from the open outer end ofthe rotatable extension into thereceptacle 26 whence it returns through the pipe 25 to the tank 22 andis saved.

From the foregoing description of the operation it will be seen thatregulation of the supply of treating reagent to the raw water iseffected by automatically varying the head of Jihe supply of reagent ina manner to vary its level with relation to a iiXed discl'rarge of thesolution to the water in accordance with variation in the supply of rawwater to the apparatus; which constitutes the gist of my invention. Thesame result is accomplished in substantially the same way by themodified construction illustrated in Figs. 7 and 8: Therein the pipe 23terminates at its upper end in a T-coupling 33 from one end of whichprojects a rigid angular and tubular arm 29a, the outer sectionextending by preference vertically and containing a lat eralperpendicular elongated discharge-slot 28EL for the solution, while atthe opposite end of the coupling is rotatably supported in alinementwith the receptacle 26, through the medium of a stuffing-box 30u, orpacked-joint, the angular extension 31a, si1nilar to the extension 81and like the latter' having a link-connection 32a withthe lever` 16.

Mlith this construction raising or lowermg of the extension 31. underthe action of the iloat correspondingly changes the head of solutiontherein (any overflow of the solution Jfalling into the receptacle 26),the level of the solution in the extension, whatever its position, beingnecessarily the same as the level thereof in the arm 29a.

What I claim and desire to secure by Letters Patent is- 1. The method ofregulating the supply of treating reagent to the raw water undertreatment in a water-purifying apparatus of the character described,which consists in overflowing the reagent-supply and automaticallyvarying the head of the reagentsupply by varying the level of theoverflow thereof, with relation to an immovable discharge-outlet forsaidA supply to said water, in accordance with variation in the supplyof said water to the apparatus.

2. rThe method of regulating the supply of' treating reagent to therawwater under treatment in a water-purifying apparatus of the characterdescribed,.which consists in supplying the water and chemical solutioneach through an immovably iiXed discharge to the apparatus, overflowingthe solution-supply and automatically varying the head of solution byvarying the level of its overflow relative to its fixed dischargecorrespondingly with variation of the head of water relative to itsdischarge.

WALTER H. GREEN. In presence of" L. HEISLAR, R. SCHAEFER

